i had cachyOS installed for a couple of months but was plagued with random system freezes (only hard reset possible, no leads in journalctl). i tracked it down to an issue with the combination of wayland, KDE plasma and the kernel or at least that’s what i could gather from web searches. i had at least one of those freezes per week, often more.
i am now on kubuntu which basically has the same combination of things (wayland and KDE) that should cause the problem but it has been running fine for three weeks, no freezes. so something with the cachy kernel didn’t agree with my system.
i was now told i could use the arch kernel on cachyOS, which was news to me. i tried switching to the cachy LTS kernel but the issue persisted. i now wonder how does the compatibility of the linux kernel work? is it compatible because it is both arch linux? or would the kubuntu kernel also work on cachyOS?
I was experiencing similar issues under Manjaro. I couldn’t tell exactly when it happened but attributed it to a kernel or other update.
Are you seeing anything in dmesg? I was seeing kernel ring timeouts just after booting (I don’t know how it recorded them from before the freeze but it did). My searches led me to find that the Ryzen 5600 silicon had degraded just enough to be unstable. I could underclock it and it got a bit better but not fixed. In the end I replaced it with a new 5800 and the issues completely went away.